Car-brake.



Patented May I, I900. F. M. EGGERT.

GAR BRAKE.

(Application filed Feb. 17, 1899.)

(No Model.)

Ewan/707" ITED S Tlohl forming part of.

Letters pa e no. 648,730, dated May 1 Application filed'Ie-brnnry 17,1899. SerialrNo. 705,834. (No model.)

troit, in the county: f \Va-yne and State of 4 Michigamliave invented certain. new and u sefullmprovementsin'Qar-Brakes, of which the following is a. specification, reference being had therein to the accompanying drawings.

1 The' invention relates, generally to carbrakes particularly, designedv for use" upon e1ectrically-operatedstreetsrailway cars.

The principal object of my invention is to provide abrakemecha-ni'sm that will be more efiectiveinitsopertionthan those now'inuse, and thisI acc'ompl'ishby constructing the said mechanism in such; a manner that it may be applied directlyto-the. track instead of exclusivelyto' the wheels, which latter is theordinaryconstruction, or-I may apply said brake mechanism simultaneously to the track and "wheels for the purposeof. obtaininga maximum, amount otfriction.

A further objectofi my invention is to con:- s tru'ct the brakemechanism so thatthemotor and brakes may be operated successively by asingle actuating device.

r lViththese objects in view my invention consists in an improved brakemechanism and. in the peculiar construction, arrangemeit and combination of the various parts'thereo asmore fully hereinafter described, and point ed out in theclaims.

Figure 1 is'a sectional elevation of my improved brake, illustrating the same applied" to a car; Fig. 2' is a similar view showing-the 'n is a diagram planview of'tl're brake mechan ism, illustrating'the connections between the single operati'ngdevice and the-shoe and Fi t is a perspective view of a rheostat or controllerand of the common actuating devicefor the latter'and the brakes.

I preferably employ the brake mechanism upon each side of the car; but as the con-' struction of'the two'parts i'sidentical only one will be described.

The reference-letter A designates an ordinar wheeled truck, and the flooring-thereon, at the forward part. of which is located the usual motor rheostat or controller 0.

Upon one side of, the-frame and intermediate the wheel are arranged vertical guides D,

Fig a secured to said frame by bolts (F, in which is mounted for reciproc'atory movement the F, and therelation between the parts ismaintained' through the agency (if a connectinglink-1', the ends I)" and o of which are fixedly secured tothe shoe, while the other end is bent at right angles to the ends referred to and engages w-ithi 11a slot J, formed for that purposewithin the cam.

In order that a minimum amount of friction will take place between the cam and the'shoe, Iprovide a ball-bearing between the parts. This bearing is constructed by forming a groove 60 in the top of the shoe and arranging Y a series of balls b-therei'n.

Any means may be employed for actuating the cam-wheel to produce the result desired; I but I preferably employa-n' actuating device that will successively operate the motor and the brakes," This actuating mechanism will} i v v I I 1: The rheostat C'is provided with a shaft 0 now be described;

and: on the top of said shaft is arranged a segmental gear d'. Mounted upon the stud e, extending laterally-from the rheostat-casing, is a segmental gear-wheel K, which is adapted at certain times to mesh with the teeth upon the gear-segment d. The segment K extends below the flooring through a slot f, formed therein forthat purpose, and meshes with a gear wheel g, which is fixed upon a stu b-shatt h, having'suitable bearings in hangers depending from the fioor.

' Fixedly secured to the shaft h or formed integral with the gear-wheel as is the preferableconstruction, is a bevel-gear i, which is adapted to mesh with the complementary bevel-geaiyj, secured to the transverse shaft 7b,, journ-aled in suitable supports. This latter" shaft is provided at its center with a sprocket-wheel Z, and a sprocket-chain q c"onneots; this wheel with a similar sprocket m upon the transverse shaft H.

'- 0 designates-a handle upon the segmental 'gearK. r

vice is employed for operating the rheostat and the brakes and that at no time can the brakes be applied without first cutting off the current, or vice versa.

In order-to obtain-an increased amount of friction, I preferably employ, in addition to the track-shoe above described, brake-levers L, which are pivoted by bolts 12 to the sides of the truck-frame, and arrange. thesame in such manner as to be operated simultaneously I with the cam G, The detail construction is as follows: The brake-levers comprise, essen; tially, operating-arms 1' and the shoes s upon the complementary arms s',-the levers being pivoted atlpoin'ts' in proximity to the wheels.

The free ends ofthearms r of the levers are adapted 'to"engage"within recesses tin the track-shoe, as plainly shown in Fig. 2, whereby'a loose confle'ction' between the shoe and the lever is obtained. The parts are so arranged relatively to each other that when the trackshoe'ismoved' in engagement with the rail the shoes upon the levers will be moved in turn into engagement with-the wheels.

From the foregoing description of my invention it will be readily observed that by a simple mechanism Ihave provided more effective brakingapparatus than has heretofore been used and have so arranged the parts as to permit of the said mechanism being readily attached to an electric car of ordinary construction. Likewise by employing a cam arranged and operating in connection with the brake-shoe in the manner shown and described and a gearconnection between the cam and the operating device, whereby the former maybe moved positively in either direction, the brake-shoe'after the act of braking has been effected will remain in proper relation to the rail without any effort on the partof the operator a'nd'likewise without the use of any locking device such as heretofore I has been necessary.

.What I claim as my invention is.

1. In abrake mechanism, the combination with the motor-rheostat, of the track-shoe, a segmental gear-wheel connected to the rheostat, a driven shaft operated by the segment, a cam adapted to bear against and reciprocate the track-shoe, and a drive connection be-' tween the driven shaft and the cam, comprising a cam -'shaft carrying a-sprocket-wheel thereon, a sprocket-wheel upon the driven shaft, and a sprocket-chain sprocket-wheels.

2. In a brake mechanism, the combinationwith a car-truck,vof .a track-shoe mounted thereon intermediate the wheels for reciprocation, said shoe having a recess formed in each side thereof, a brake-lever pivoted to the truck intermediate each wheel and the shoe, one end of eachlever extending within the slot in the shoe, and abrake-shoe carried by the other ends of said levers, substantially as described.

In testimony whereof I ailix my signature in presence of twowitnesses.

FRANZ IS M. G 'R'T. Witnesses:

M. B. ODOGHERTY, H. 0. SMITH.

' connecting the 

